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Tableaux for Łukasiewicz Infinite-valued Logic

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Abstract

In this work we propose a labelled tableau method for Łukasiewicz infinite-valued logic L ω. The method is based on the Kripke semantics of this logic developed by Urquhart [25] and Scott [24]. On the one hand, our method falls under the general paradigm of labelled deduction [8] and it is rather close to the tableau systems for sub-structural logics proposed in [4]. On the other hand, it provides a CoNP decision procedure for L ω validity by reducing the check of branch closure to linear programming

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Olivetti, N. Tableaux for Łukasiewicz Infinite-valued Logic. Studia Logica 73, 81–111 (2003). https://doi.org/10.1023/A:1022989323091

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